Vulnerabilities > CVE-2016-2378 - Improper Restriction of Operations within the Bounds of a Memory Buffer vulnerability in multiple products
Attack vector
NETWORK Attack complexity
HIGH Privileges required
NONE Confidentiality impact
HIGH Integrity impact
HIGH Availability impact
HIGH Summary
A buffer overflow vulnerability exists in the handling of the MXIT protocol Pidgin. Specially crafted data sent via the server could potentially result in a buffer overflow, potentially resulting in memory corruption. A malicious server or an unfiltered malicious user can send negative length values to trigger this vulnerability.
Vulnerable Configurations
Common Weakness Enumeration (CWE)
Common Attack Pattern Enumeration and Classification (CAPEC)
- Buffer Overflow via Environment Variables This attack pattern involves causing a buffer overflow through manipulation of environment variables. Once the attacker finds that they can modify an environment variable, they may try to overflow associated buffers. This attack leverages implicit trust often placed in environment variables.
- Overflow Buffers Buffer Overflow attacks target improper or missing bounds checking on buffer operations, typically triggered by input injected by an attacker. As a consequence, an attacker is able to write past the boundaries of allocated buffer regions in memory, causing a program crash or potentially redirection of execution as per the attackers' choice.
- Client-side Injection-induced Buffer Overflow This type of attack exploits a buffer overflow vulnerability in targeted client software through injection of malicious content from a custom-built hostile service.
- Filter Failure through Buffer Overflow In this attack, the idea is to cause an active filter to fail by causing an oversized transaction. An attacker may try to feed overly long input strings to the program in an attempt to overwhelm the filter (by causing a buffer overflow) and hoping that the filter does not fail securely (i.e. the user input is let into the system unfiltered).
- MIME Conversion An attacker exploits a weakness in the MIME conversion routine to cause a buffer overflow and gain control over the mail server machine. The MIME system is designed to allow various different information formats to be interpreted and sent via e-mail. Attack points exist when data are converted to MIME compatible format and back.
Nessus
NASL family Debian Local Security Checks NASL id DEBIAN_DSA-3620.NASL description Yves Younan of Cisco Talos discovered several vulnerabilities in the MXit protocol support in pidgin, a multi-protocol instant messaging client. A remote attacker can take advantage of these flaws to cause a denial of service (application crash), overwrite files, information disclosure, or potentially to execute arbitrary code. last seen 2020-06-01 modified 2020-06-02 plugin id 92328 published 2016-07-18 reporter This script is Copyright (C) 2016-2019 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/92328 title Debian DSA-3620-1 : pidgin - security update NASL family Huawei Local Security Checks NASL id EULEROS_SA-2019-2387.NASL description According to the versions of the pidgin package installed, the EulerOS installation on the remote host is affected by the following vulnerabilities : - An information leak exists in the handling of the MXIT protocol in Pidgin. Specially crafted MXIT data sent via the server could potentially result in an out-of-bounds read. A malicious user, server, or man-in-the-middle can send an invalid size for an avatar which will trigger an out-of-bounds read vulnerability. This could result in a denial of service or copy data from memory to the file, resulting in an information leak if the avatar is sent to another user.(CVE-2016-2367) - A denial of service vulnerability exists in the handling of the MXIT protocol in Pidgin. Specially crafted MXIT data sent from the server could potentially result in an out-of-bounds read. A malicious server or man-in-the-middle attacker can send invalid data to trigger this vulnerability.(CVE-2016-2370) - A denial of service vulnerability exists in the handling of the MXIT protocol in Pidgin. Specially crafted MXIT data sent via the server could potentially result in a null pointer dereference. A malicious server or an attacker who intercepts the network traffic can send invalid data to trigger this vulnerability and cause a crash.(CVE-2016-2365) - A buffer overflow vulnerability exists in the handling of the MXIT protocol Pidgin. Specially crafted data sent via the server could potentially result in a buffer overflow, potentially resulting in memory corruption. A malicious server or an unfiltered malicious user can send negative length values to trigger this vulnerability.(CVE-2016-2378) - A denial of service vulnerability exists in the handling of the MXIT protocol in Pidgin. Specially crafted MXIT data sent via the server could potentially result in an out-of-bounds read. A malicious server or an attacker who intercepts the network traffic can send invalid data to trigger this vulnerability and cause a crash.(CVE-2016-2366 ) - Multiple memory corruption vulnerabilities exist in the handling of the MXIT protocol in Pidgin. Specially crafted MXIT data sent via the server could result in multiple buffer overflows, potentially resulting in code execution or memory disclosure.(CVE-2016-2368) - A NULL pointer dereference vulnerability exists in the handling of the MXIT protocol in Pidgin. Specially crafted MXIT data sent via the server could potentially result in a denial of service vulnerability. A malicious server can send a packet starting with a NULL byte triggering the vulnerability.(CVE-2016-2369) - An out-of-bounds write vulnerability exists in the handling of the MXIT protocol in Pidgin. Specially crafted MXIT data sent via the server could cause memory corruption resulting in code execution.(CVE-2016-2371) - A denial of service vulnerability exists in the handling of the MXIT protocol in Pidgin. Specially crafted MXIT data sent via the server could potentially result in an out-of-bounds read. A malicious server or user can send an invalid mood to trigger this vulnerability.(CVE-2016-2373) - An exploitable memory corruption vulnerability exists in the handling of the MXIT protocol in Pidgin. Specially crafted MXIT MultiMX message sent via the server can result in an out-of-bounds write leading to memory disclosure and code execution.(CVE-2016-2374) - An exploitable out-of-bounds read exists in the handling of the MXIT protocol in Pidgin. Specially crafted MXIT contact information sent from the server can result in memory disclosure.(CVE-2016-2375) - A buffer overflow vulnerability exists in the handling of the MXIT protocol in Pidgin. Specially crafted MXIT data sent from the server could potentially result in arbitrary code execution. A malicious server or an attacker who intercepts the network traffic can send an invalid size for a packet which will trigger a buffer overflow.(CVE-2016-2376) - A buffer overflow vulnerability exists in the handling of the MXIT protocol in Pidgin. Specially crafted MXIT data sent by the server could potentially result in an out-of-bounds write of one byte. A malicious server can send a negative content-length in response to a HTTP request triggering the vulnerability.(CVE-2016-2377) - An information leak exists in the handling of the MXIT protocol in Pidgin. Specially crafted MXIT data sent to the server could potentially result in an out-of-bounds read. A user could be convinced to enter a particular string which would then get converted incorrectly and could lead to a potential out-of-bounds read.(CVE-2016-2380) - A directory traversal exists in the handling of the MXIT protocol in Pidgin. Specially crafted MXIT data sent from the server could potentially result in an overwrite of files. A malicious server or someone with access to the network traffic can provide an invalid filename for a splash image triggering the vulnerability.(CVE-2016-4323) Note that Tenable Network Security has extracted the preceding description block directly from the EulerOS security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues. last seen 2020-05-08 modified 2019-12-10 plugin id 131879 published 2019-12-10 reporter This script is Copyright (C) 2019-2020 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/131879 title EulerOS 2.0 SP2 : pidgin (EulerOS-SA-2019-2387) NASL family Gentoo Local Security Checks NASL id GENTOO_GLSA-201701-38.NASL description The remote host is affected by the vulnerability described in GLSA-201701-38 (Pidgin: Multiple vulnerabilities) Multiple vulnerabilities have been discovered in Pidgin. Please review the CVE identifiers referenced below for details. Impact : A remote attacker might send specially crafted data using the MXit protocol, possibly resulting in the remote execution of arbitrary code with the privileges of the process, a Denial of Service condition, or in leaking confidential information. Workaround : There is no known workaround at this time. last seen 2020-06-01 modified 2020-06-02 plugin id 96542 published 2017-01-17 reporter This script is Copyright (C) 2017-2018 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/96542 title GLSA-201701-38 : Pidgin: Multiple vulnerabilities NASL family Windows NASL id PIDGIN_2_11_0.NASL description The version of Pidgin installed on the remote Windows host is prior to 2.11.0. It is, therefore, affected by multiple vulnerabilities : - A NULL pointer dereference flaw exists when handling the MXIT protocol. A remote attacker can exploit this, via crafted MXIT data, to cause a denial of service. (CVE-2016-2365) - Multiple out-of-bounds read errors exist when handling the MXIT protocol. A remote attacker can exploit these, via crafted MXIT data, to cause a denial of service. (CVE-2016-2366, CVE-2016-2370) - An out-of-bounds read error exists when handling the MXIT protocol. A remote attacker can exploit this, via an invalid size for an avatar, to disclose memory contents or cause a denial of service. (CVE-2016-2367) - Multiple memory corruption issues exist when handling the MXIT protocol. A remote attacker can exploit these, via crafted MXIT data, to disclose memory contents or execute arbitrary code. (CVE-2016-2368) - A NULL pointer dereference flaw exists when handling the MXIT protocol. A remote attacker can exploit this, via crafted MXIT packet starting with a NULL byte, to cause a denial of service. (CVE-2016-2369) - An out-of-bounds write error exists when handling the MXIT protocol. A remote attacker can exploit this, via crafted MXIT data, to corrupt memory, resulting in the execution of arbitrary code. (CVE-2016-2371) - An out-of-bounds read error exists when handling the MXIT protocol. A remote attacker can exploit this, via an invalid size for a file transfer, to disclose memory contents or cause a denial of service. (CVE-2016-2372) - An out-of-bounds read error exists when handling the MXIT protocol. A remote attacker can exploit this, by sending an invalid mood, to cause a denial of service. (CVE-2016-2373) - An out-of-bounds write error exists when handling the MXIT protocol. A remote attacker can exploit this, via crafted MXIT MultiMX messages, to disclose memory contents or execute arbitrary code. (CVE-2016-2374) - An out-of-bounds read error exists when handling the MXIT protocol. A remote attacker can exploit this, via crafted MXIT contact information, to disclose memory contents. (CVE-2016-2375) - A buffer overflow condition exists when handling the MXIT protocol. A remote attacker can exploit this, via a crafted packet having an invalid size, to execute arbitrary code. (CVE-2016-2376) - An out-of-bounds write error exists when handling the MXIT protocol. A remote attacker can exploit this, via a negative content-length response to an HTTP request, to cause a denial of service. (CVE-2016-2377) - A buffer overflow condition exists when handling the MXIT protocol. A remote attacker can exploit this, via crafted data using negative length values, to cause a denial of service. (CVE-2016-2378) - A flaw exists in MXIT due to using weak cryptography when encrypting a user password. A man-in-the-middle attacker able to access login messages can exploit this to impersonate the user. (CVE-2016-2379) - An out-of-bounds read error exists when handling the MXIT protocol. A remote attacker can exploit this, via a crafted local message, to disclose memory contents. (CVE-2016-2380) - A directory traversal flaw exists when handling the MXIT protocol. A remote attacker can exploit this, via crafted MXIT data using an invalid file name for a splash image, to overwrite files. (CVE-2016-4323) - An unspecified vulnerability exists due to X.509 certificates not being properly imported when using GnuTLS. No other details are available. last seen 2020-06-01 modified 2020-06-02 plugin id 91784 published 2016-06-23 reporter This script is Copyright (C) 2016-2019 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/91784 title Pidgin < 2.11.0 Multiple Vulnerabilities NASL family Debian Local Security Checks NASL id DEBIAN_DLA-542.NASL description Numerous security issues have been identified and fixed in Pidgin in Debian/Wheezy. CVE-2016-2365 MXIT Markup Command Denial of Service Vulnerability CVE-2016-2366 MXIT Table Command Denial of Service Vulnerability CVE-2016-2367 MXIT Avatar Length Memory Disclosure Vulnerability CVE-2016-2368 MXIT g_snprintf Multiple Buffer Overflow Vulnerabilities CVE-2016-2369 MXIT CP_SOCK_REC_TERM Denial of Service Vulnerability CVE-2016-2370 MXIT Custom Resource Denial of Service Vulnerability CVE-2016-2371 MXIT Extended Profiles Code Execution Vulnerability CVE-2016-2372 MXIT File Transfer Length Memory Disclosure Vulnerability CVE-2016-2373 MXIT Contact Mood Denial of Service Vulnerability CVE-2016-2374 MXIT MultiMX Message Code Execution Vulnerability CVE-2016-2375 MXIT Suggested Contacts Memory Disclosure Vulnerability CVE-2016-2376 MXIT read stage 0x3 Code Execution Vulnerability CVE-2016-2377 MXIT HTTP Content-Length Buffer Overflow Vulnerability CVE-2016-2378 MXIT get_utf8_string Code Execution Vulnerability CVE-2016-2380 MXIT mxit_convert_markup_tx Information Leak Vulnerability CVE-2016-4323 MXIT Splash Image Arbitrary File Overwrite Vulnerability For Debian 7 last seen 2020-03-17 modified 2016-07-05 plugin id 91922 published 2016-07-05 reporter This script is Copyright (C) 2016-2020 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/91922 title Debian DLA-542-1 : pidgin security update NASL family Ubuntu Local Security Checks NASL id UBUNTU_USN-3031-1.NASL description Yves Younan discovered that Pidgin contained multiple issues in the MXit protocol support. A remote attacker could use this issue to cause Pidgin to crash, resulting in a denial of service, or possibly execute arbitrary code. Note that Tenable Network Security has extracted the preceding description block directly from the Ubuntu security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues. last seen 2020-06-01 modified 2020-06-02 plugin id 92033 published 2016-07-13 reporter Ubuntu Security Notice (C) 2016-2019 Canonical, Inc. / NASL script (C) 2016-2019 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/92033 title Ubuntu 12.04 LTS / 14.04 LTS / 15.10 : pidgin vulnerabilities (USN-3031-1) NASL family Huawei Local Security Checks NASL id EULEROS_SA-2019-2222.NASL description According to the versions of the pidgin package installed, the EulerOS installation on the remote host is affected by the following vulnerabilities : - Pidgin is an instant messaging program which can log in to multiple accounts on multiple instant messaging networks simultaneously.Security Fix(es):A buffer overflow vulnerability exists in the handling of the MXIT protocol Pidgin. Specially crafted data sent via the server could potentially result in a buffer overflow, potentially resulting in memory corruption. A malicious server or an unfiltered malicious user can send negative length values to trigger this vulnerability.(CVE-2016-2378)A buffer overflow vulnerability exists in the handling of the MXIT protocol in Pidgin. Specially crafted MXIT data sent from the server could potentially result in arbitrary code execution. A malicious server or an attacker who intercepts the network traffic can send an invalid size for a packet which will trigger a buffer overflow.(CVE-2016-2376)An exploitable out-of-bounds read exists in the handling of the MXIT protocol in Pidgin. Specially crafted MXIT contact information sent from the server can result in memory disclosure.(CVE-2016-2375)An exploitable memory corruption vulnerability exists in the handling of the MXIT protocol in Pidgin. Specially crafted MXIT MultiMX message sent via the server can result in an out-of-bounds write leading to memory disclosure and code execution.(CVE-2016-2374)A buffer overflow vulnerability exists in the handling of the MXIT protocol in Pidgin. Specially crafted MXIT data sent by the server could potentially result in an out-of-bounds write of one byte. A malicious server can send a negative content-length in response to a HTTP request triggering the vulnerability.(CVE-2016-2377)A denial of service vulnerability exists in the handling of the MXIT protocol in Pidgin. Specially crafted MXIT data sent via the server could potentially result in an out-of-bounds read. A malicious server or user can send an invalid mood to trigger this vulnerability.(CVE-2016-2373)An out-of-bounds write vulnerability exists in the handling of the MXIT protocol in Pidgin. Specially crafted MXIT data sent via the server could cause memory corruption resulting in code execution.(CVE-2016-2371)A directory traversal exists in the handling of the MXIT protocol in Pidgin. Specially crafted MXIT data sent from the server could potentially result in an overwrite of files. A malicious server or someone with access to the network traffic can provide an invalid filename for a splash image triggering the vulnerability.(CVE-2016-4323)An information leak exists in the handling of the MXIT protocol in Pidgin. Specially crafted MXIT data sent to the server could potentially result in an out-of-bounds read. A user could be convinced to enter a particular string which would then get converted incorrectly and could lead to a potential out-of-bounds read.(CVE-2016-2380)An information leak exists in the handling of the MXIT protocol in Pidgin. Specially crafted MXIT data sent via the server could potentially result in an out-of-bounds read. A malicious user, server, or man-in-the-middle attacker can send an invalid size for a file transfer which will trigger an out-of-bounds read vulnerability. This could result in a denial of service or copy data from memory to the file, resulting in an information leak if the file is sent to another user.(CVE-2016-2372)A NULL pointer dereference vulnerability exists in the handling of the MXIT protocol in Pidgin. Specially crafted MXIT data sent via the server could potentially result in a denial of service vulnerability. A malicious server can send a packet starting with a NULL byte triggering the vulnerability.(CVE-2016-2369)A denial of service vulnerability exists in the handling of the MXIT protocol in Pidgin. Specially crafted MXIT data sent from the server could potentially result in an out-of-bounds read. A malicious server or man-in-the-middle attacker can send invalid data to trigger this vulnerability.(CVE-2016-2370)A denial of service vulnerability exists in the handling of the MXIT protocol in Pidgin. Specially crafted MXIT data sent via the server could potentially result in a null pointer dereference. A malicious server or an attacker who intercepts the network traffic can send invalid data to trigger this vulnerability and cause a crash.(CVE-2016-2365)A denial of service vulnerability exists in the handling of the MXIT protocol in Pidgin. Specially crafted MXIT data sent via the server could potentially result in an out-of-bounds read. A malicious server or an attacker who intercepts the network traffic can send invalid data to trigger this vulnerability and cause a crash.(CVE-2016-2366)An information leak exists in the handling of the MXIT protocol in Pidgin. Specially crafted MXIT data sent via the server could potentially result in an out-of-bounds read. A malicious user, server, or man-in-the-middle can send an invalid size for an avatar which will trigger an out-of-bounds read vulnerability. This could result in a denial of service or copy data from memory to the file, resulting in an information leak if the avatar is sent to another user.(CVE-2016-2367) Note that Tenable Network Security has extracted the preceding description block directly from the EulerOS security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues. last seen 2020-05-08 modified 2019-11-08 plugin id 130684 published 2019-11-08 reporter This script is Copyright (C) 2019-2020 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/130684 title EulerOS 2.0 SP5 : pidgin (EulerOS-SA-2019-2222) NASL family Huawei Local Security Checks NASL id EULEROS_SA-2019-2650.NASL description According to the versions of the pidgin package installed, the EulerOS installation on the remote host is affected by the following vulnerabilities : - A buffer overflow vulnerability exists in the handling of the MXIT protocol in Pidgin. Specially crafted MXIT data sent by the server could potentially result in an out-of-bounds write of one byte. A malicious server can send a negative content-length in response to a HTTP request triggering the vulnerability.(CVE-2016-2377) - A buffer overflow vulnerability exists in the handling of the MXIT protocol in Pidgin. Specially crafted MXIT data sent from the server could potentially result in arbitrary code execution. A malicious server or an attacker who intercepts the network traffic can send an invalid size for a packet which will trigger a buffer overflow.(CVE-2016-2376) - A buffer overflow vulnerability exists in the handling of the MXIT protocol Pidgin. Specially crafted data sent via the server could potentially result in a buffer overflow, potentially resulting in memory corruption. A malicious server or an unfiltered malicious user can send negative length values to trigger this vulnerability.(CVE-2016-2378) - A denial of service vulnerability exists in the handling of the MXIT protocol in Pidgin. Specially crafted MXIT data sent from the server could potentially result in an out-of-bounds read. A malicious server or man-in-the-middle attacker can send invalid data to trigger this vulnerability.(CVE-2016-2370) - A denial of service vulnerability exists in the handling of the MXIT protocol in Pidgin. Specially crafted MXIT data sent via the server could potentially result in a null pointer dereference. A malicious server or an attacker who intercepts the network traffic can send invalid data to trigger this vulnerability and cause a crash.(CVE-2016-2365) - A denial of service vulnerability exists in the handling of the MXIT protocol in Pidgin. Specially crafted MXIT data sent via the server could potentially result in an out-of-bounds read. A malicious server or an attacker who intercepts the network traffic can send invalid data to trigger this vulnerability and cause a crash.(CVE-2016-2366) - A denial of service vulnerability exists in the handling of the MXIT protocol in Pidgin. Specially crafted MXIT data sent via the server could potentially result in an out-of-bounds read. A malicious server or user can send an invalid mood to trigger this vulnerability.(CVE-2016-2373) - A directory traversal exists in the handling of the MXIT protocol in Pidgin. Specially crafted MXIT data sent from the server could potentially result in an overwrite of files. A malicious server or someone with access to the network traffic can provide an invalid filename for a splash image triggering the vulnerability.(CVE-2016-4323) - A NULL pointer dereference vulnerability exists in the handling of the MXIT protocol in Pidgin. Specially crafted MXIT data sent via the server could potentially result in a denial of service vulnerability. A malicious server can send a packet starting with a NULL byte triggering the vulnerability.(CVE-2016-2369) - An exploitable memory corruption vulnerability exists in the handling of the MXIT protocol in Pidgin. Specially crafted MXIT MultiMX message sent via the server can result in an out-of-bounds write leading to memory disclosure and code execution.(CVE-2016-2374) - An exploitable out-of-bounds read exists in the handling of the MXIT protocol in Pidgin. Specially crafted MXIT contact information sent from the server can result in memory disclosure.(CVE-2016-2375) - An information leak exists in the handling of the MXIT protocol in Pidgin. Specially crafted MXIT data sent to the server could potentially result in an out-of-bounds read. A user could be convinced to enter a particular string which would then get converted incorrectly and could lead to a potential out-of-bounds read.(CVE-2016-2380) - An information leak exists in the handling of the MXIT protocol in Pidgin. Specially crafted MXIT data sent via the server could potentially result in an out-of-bounds read. A malicious user, server, or man-in-the-middle attacker can send an invalid size for a file transfer which will trigger an out-of-bounds read vulnerability. This could result in a denial of service or copy data from memory to the file, resulting in an information leak if the file is sent to another user.(CVE-2016-2372) - An information leak exists in the handling of the MXIT protocol in Pidgin. Specially crafted MXIT data sent via the server could potentially result in an out-of-bounds read. A malicious user, server, or man-in-the-middle can send an invalid size for an avatar which will trigger an out-of-bounds read vulnerability. This could result in a denial of service or copy data from memory to the file, resulting in an information leak if the avatar is sent to another user.(CVE-2016-2367) - An out-of-bounds write vulnerability exists in the handling of the MXIT protocol in Pidgin. Specially crafted MXIT data sent via the server could cause memory corruption resulting in code execution.(CVE-2016-2371) - Multiple memory corruption vulnerabilities exist in the handling of the MXIT protocol in Pidgin. Specially crafted MXIT data sent via the server could result in multiple buffer overflows, potentially resulting in code execution or memory disclosure.(CVE-2016-2368) Note that Tenable Network Security has extracted the preceding description block directly from the EulerOS security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues. last seen 2020-05-08 modified 2019-12-18 plugin id 132185 published 2019-12-18 reporter This script is Copyright (C) 2019-2020 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/132185 title EulerOS 2.0 SP3 : pidgin (EulerOS-SA-2019-2650)
Seebug
| bulletinFamily | exploit |
| description | ### DESCRIPTION A buffer overflow vulnerability exists in the handling of the MXIT protocol Pidgin. Specially crafted data sent via the server could potentially result in a buffer overflow, potentially resulting in memory corruption. A malicious server or an unfiltered malicious user can send negative length values to trigger this vulnerability. ### CVSSv3 SCORE 8.1 CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H ### TESTED VERSIONS Pidgin 2.10.11 ### PRODUCT URLs https://www.pidgin.im/ ### DETAILS The function getutf8string, defined at line 231 in libpurple/protocols/mxit/chunk.c will take a maximum string length as argument. Usually this is passed in as the size of the string str that is being written to. It will read the length of the string at line 238 and check to ensure that it is not larger than the maximum string length at line 240. If it is, it will set the length to be equal to maxstrlen. ``` 238 pos += get_int16( &chunkdata[pos], &len ); 239 240 if ( len > maxstrlen ) { … 243 skip = len - maxstrlen; 244 len = maxstrlen; 245 } ``` However, len is a signed short that will be read from nthos, which will read an unsigned integer, but because len is signed it will be cast to a signed integer. If the value of len is a large positive value it will be cast to a negative value, bypassing the size check at line 240. The call to getdata at line 248 will then result in a buffer overflow: 248 pos += getdata( &chunkdata[pos], str, len ); The function get_data will end up calling memcpy which expects an unsigned size parameter and will interpret a negative value as a large positive value. ### TIMELINE * 2016-04-13 - Vendor Notification * 2016-06-21 - Public Disclosure |
| id | SSV:96744 |
| last seen | 2017-11-19 |
| modified | 2017-10-19 |
| published | 2017-10-19 |
| reporter | Root |
| title | Pidgin MXIT get_utf8_string Code Execution Vulnerability(CVE-2016-2378) |
Talos
| id | TALOS-2016-0120 |
| last seen | 2019-05-29 |
| published | 2016-06-21 |
| reporter | Talos Intelligence |
| source | http://www.talosintelligence.com/vulnerability_reports/TALOS-2016-0120 |
| title | Pidgin MXIT get_utf8_string Code Execution Vulnerability |
References
- http://www.debian.org/security/2016/dsa-3620
- http://www.debian.org/security/2016/dsa-3620
- http://www.pidgin.im/news/security/?id=94
- http://www.pidgin.im/news/security/?id=94
- http://www.securityfocus.com/bid/91335
- http://www.securityfocus.com/bid/91335
- http://www.talosintelligence.com/reports/TALOS-2016-0120/
- http://www.talosintelligence.com/reports/TALOS-2016-0120/
- http://www.ubuntu.com/usn/USN-3031-1
- http://www.ubuntu.com/usn/USN-3031-1
- https://security.gentoo.org/glsa/201701-38
- https://security.gentoo.org/glsa/201701-38